10 x 5 foot plasma table build

[ned]

Oh

for got to mention, the reason I started this thread now is, I have to make the roller table square also. I dont know how to do that. Ever since the inception of this idea ive been mulling over it. I can get my dad to do it, he lives 100 miles away so its an ask, and I'd rather learn to do it myself.

Has anyone any tips or advice? the table will look like this below. Ill make a 14 foot table and then cut out the section where the saw sits (the box on top represents the saw)



So I'm left with the puzzle, how to make the two side bars perfectly parallel.




The floor of my shed isnt even, nor is anything else I can think of, perfectly flat.

Someone on mig-welding.co.uk suggested i bolt it first and then adjust, which seems like it might work